Solar panel prices and how to choose the right wattage for your home
Monocrystalline vs polycrystalline, 450–720W modules, and how to size your array.
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Practical articles and guides to choose the right inverter, battery and solar panel.
Solar inverters explained: on-grid vs off-grid vs hybrid
Which inverter type fits your home, villa or business — sizing and brand guide.
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Log in / Sign up freeLithium vs lead-acid batteries: lifespan, cost and efficiency
Why LiFePO4 is replacing lead-acid, and when lead-acid still makes sense.
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Log in / Sign up freeHow to calculate the number of solar panels for a home or business
Step by step from daily kWh to peak sun hours, real-world derating, required area and DC/AC ratio limits. For an accurate result in your own country, use this site's Calculator.
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Log in / Sign up freeSizing your inverter: from steady load to motor start-up surge
Continuous load, diversity factor, power factor and motor inrush. Converting to kVA and picking the right inverter. For a precise result with your own devices, use this site's Calculator.
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Log in / Sign up freeBattery capacity for outage hours and night-time usage
Convert Wh to Ah, depth of discharge for lithium vs lead-acid, efficiency, and series/parallel wiring. For an exact result in your own country, use this site's Calculator.
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Log in / Sign up freeInvesting in solar and selling power to the grid
Feed-in tariff and PPA mechanisms, payback and IRR calculation, degradation and O&M costs. Choose the 'sell to grid' mode in this site's Calculator to see the number for your own country.
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